I could pipe up right now, but I'd sound like these two!!
BTW,, I own a S&W M&P9c, 9 others(friends & family) have them(M&P) as well in some variant/cal.
You could get a .40 compact, get a .357Sig barrel, and some FS mags for HD.
AND you can get a 9mm barrel, and some 9mm mags and run the same gun.
Go to the range that rents , and shoot what your friends and family do not have, then buy.